Abstract-The fundamental aim of monitoring is to identify abnormalities in the observed phenomena and allow inference of the likely cause. Faced with the common problems of spatially irregular sensor distribution and intermittent sensor measurement availability, key to fulfilling the monitoring aim is filling in the spatio-temporal gaps in the data. Whilst Wireless Sensor Networks (WSN) technology, combined with MEMS availability potentially offer sensing solutions for a variety of application domains, in the context of monitoring applications a conceptual shift is needed from currently available, point-measurement based "sense-and-send" systems towards the provision of phenomena field representations, in real-time, enabling effective visualisation of the spatio-temporal patterns.This paper argues the case for a generic, rapid prototyping framework for end-to-end sensing systems that support the approach of providing field representations for visualisation. A formal approach to framework development was taken, ensuring that resulting instrumentation systems are well specified. Both the framework development and its evaluation are linked to the full cycle of requirements setting, design, and deployment of a prototype instrumentation system for aerospace applicationsspecifically, health monitoring of a gas turbine engine. The FieldMAP (Field Monitoring Application Prototyping) framework supports multi-modal sensing, provides a number of opportunities for data processing and information extraction, caters for monitoring of the instrumentation health, offers a modular fieldmapping design component and allows for real-time phenomena visualisation, data and information logging and post-analysis. Experience with the FieldMAP has shown that sophisticated and robust prototypes can be developed in a short period of time.